2x+8y=10 y=7-3x

Answer 1

2x + 8y = 10 .................................(1)

y = 7 - 3x ......................................(2)

You can solve this by substitution. Replace y in (1) by the value of y in (2):

2x + 8 (7 - 3 x) = 10

2x + 56 - 24 x = 10

56 - 22 x = 10

22 x = 56 - 10

22 x = 46

x = 46/22 = 23/11

y = 7 - 3 x = 7 - 3 (23/11) = 7 - (69/11) = (77 - 69)/11 = 8/11

x = 23/11 and y = 8/11